CN-121992813-A - Micro-vibration control construction process for grating vibration isolation foundation

CN121992813ACN 121992813 ACN121992813 ACN 121992813ACN-121992813-A

Abstract

The invention discloses a micro-vibration control construction process of a grating vibration isolation foundation, and relates to the technical field of building construction. The method comprises the steps of S1, measuring and positioning, S2, grading gravel cushion layer construction, S3, compaction coefficient detection, S4, paying off the bottom of the shock insulation pier, measuring and paying off the side line control point of each shock insulation pier, S5, side mold installation and steel bar binding, wherein the distance between the shock insulation pier and a device pavement foundation is 10cm, a 10cm thick foam polyethylene plate is adopted for side mold installation and binding with steel bars, S6, large-volume concrete pouring and temperature control are carried out, layered pushing type continuous pouring is adopted, the thickness of each layer is not more than 50cm, S7, concrete maintenance is carried out, and S8, cushion joint treatment is carried out. According to the invention, the compaction graded sand and stone cushion layer is arranged as the vibration isolation filter layer, and the large-scale independent vibration isolation pier body is combined, so that dual isolation of earthquake power response and environmental vibration is effectively realized, and stable operation of a precise instrument is ensured.

Inventors

GUO QICHANG
Xing Kaikai
SU YUNPENG
GUAN JUNSHENG
Jiao Songsong
WU XIAOLIANG
GUO ZONGWEI
ZHANG YANFENG
LI WEIHUA
LIN SEN

Assignees

中铁十局集团第七工程有限公司
中铁十局集团有限公司

Dates

Publication Date: 20260508
Application Date: 20251229

Claims (7)

1. The micro-vibration control construction process of the grating vibration isolation foundation is characterized by comprising the following operation steps of: s1, measuring and positioning, namely accurately measuring and discharging side line control piles of each shock insulation pier and a sand and stone cushion layer according to building positioning points and a building plan, and ensuring accurate positioning of a plurality of pier positions; s2, constructing a graded sand bed course, namely adopting natural graded sand to strictly lay in layers, wherein the thickness of each virtual layer is not more than 20cm, and the compaction thickness is less than or equal to 15cm; S3, detecting compaction coefficients, namely after the construction of the graded sand cushion layer is finished, checking the compaction degree on site by adopting a sand filling method, and immediately supplementing the compaction after unqualified sand cushion layer; S4, paying off the bottoms of the shock insulation piers, namely accurately measuring and paying off the sideline control points of each shock insulation pier according to the requirements of the designed shock insulation piers, and ensuring that the positions of the steel bars of the shock insulation piers are consistent with the design; s5, installing side molds and binding reinforcing steel bars, wherein the specification, the spacing and the thickness of a protective layer of the reinforcing steel bars are strictly constructed according to the drawing, the spacing between the vibration isolation piers and a foundation of the equipment pavement is 10cm, and a foam polyethylene plate with the thickness of 10cm is adopted as the side mold to be installed and bound with the reinforcing steel bars for molding; S6, pouring and controlling the temperature of the mass concrete, namely adopting layered pushing type continuous pouring, controlling the thickness of each layer to be not more than 50cm, embedding cooling water pipes, circulating water for cooling, embedding temperature measuring elements, monitoring the temperature difference between a core part and the surface in real time, and controlling the temperature difference to be within 25 ℃ to prevent temperature cracks; S7, concrete maintenance, namely immediately covering a plastic film to keep water after pouring is finished, and covering geotextile on the upper part to keep heat and moisture; and S8, treating a buffer seam, namely arranging the buffer seam between the shock insulation pier and the pavement foundation, taking out the foam polyethylene plate with the thickness of 10cm, cleaning sundries in the buffer seam, and sealing the buffer seam by wrapping glass wool with a 24# galvanized steel plate.
2. The micro-vibration control construction process of the grating vibration isolation foundation according to claim 1, wherein the construction preparation is carried out before the step S1 is carried out, and a special construction scheme, a large-volume concrete construction operation instruction book and a technical base are compiled and issued to an operation team.
3. The construction process for micro-vibration control of the grating vibration isolation foundation according to claim 1, wherein in the step S2, manual cooperation with a frog rammer is adopted for compaction, so that sand and stone breakage caused by over-vibration is avoided.
4. The construction process for micro-vibration control of a grating vibration isolation foundation according to claim 1, wherein in the step S6, low-hydration cement is adopted, a high-efficiency water reducing agent and a proper amount of fly ash are mixed, the mixing ratio is adjusted, and slump is controlled.
5. The construction process for micro-vibration control of the grating vibration isolation foundation according to claim 1, wherein in the step S8, a 24# galvanized steel sheet is adhered to a base layer through a PVC waterproof coiled material.
6. The construction process for micro-vibration control of the grating vibration isolation foundation according to claim 1, wherein in the step S8, a stainless steel plate support is arranged at the upper end of a No. 24 galvanized steel sheet, and the end part of the stainless steel plate support is connected with a terrace finishing surface through silica gel seal.
7. The construction process for micro-vibration control of a grating vibration isolation foundation according to claim 1, wherein in the step S3, the compaction coefficient is not less than 0.97.

Description

Micro-vibration control construction process for grating vibration isolation foundation Technical Field The invention relates to the technical field of building construction, in particular to a micro-vibration control construction process of a grating vibration isolation foundation. Background Along with the increasingly severe requirements of high-end industries such as precision instrument manufacture, semiconductors, biological medicines and the like on the vibration control of production environments, the traditional building structure has difficulty in meeting the micro-vibration standard, and particularly in high-intensity earthquake-resistant fortification areas (such as 8 degrees and 0.20 g), how to isolate earthquake energy and effectively inhibit daily micro-vibration becomes a core problem of underground production workshop design. Therefore, the construction process for controlling the micro-vibration of the vibration isolation foundation of the earthquake vibration grating is needed to be provided. Disclosure of Invention The invention mainly aims to provide a micro-vibration control construction process for a grating vibration isolation foundation, which aims to solve the problems in the prior art. In order to solve the technical problems, the invention adopts the following technical scheme: A micro-vibration control construction process of a grating vibration isolation foundation comprises the following operation steps: s1, measuring and positioning, namely accurately measuring and discharging side line control piles of each shock insulation pier and a sand and stone cushion layer according to building positioning points and a building plan, and ensuring accurate positioning of a plurality of pier positions; s2, constructing a graded sand bed course, namely adopting natural graded sand to strictly lay in layers, wherein the thickness of each virtual layer is not more than 20cm, and the compaction thickness is less than or equal to 15cm; S3, detecting compaction coefficients, namely after the construction of the graded sand cushion layer is finished, checking the compaction degree on site by adopting a sand filling method, and immediately supplementing the compaction after unqualified sand cushion layer; S4, paying off the bottoms of the shock insulation piers, namely accurately measuring and paying off the sideline control points of each shock insulation pier according to the requirements of the designed shock insulation piers, and ensuring that the positions of the steel bars of the shock insulation piers are consistent with the design; s5, installing side molds and binding reinforcing steel bars, wherein the specification, the spacing and the thickness of a protective layer of the reinforcing steel bars are strictly constructed according to the drawing, the spacing between the vibration isolation piers and a foundation of the equipment pavement is 10cm, and a foam polyethylene plate with the thickness of 10cm is adopted as the side mold to be installed and bound with the reinforcing steel bars for molding; S6, pouring and controlling the temperature of the mass concrete, namely adopting layered pushing type continuous pouring, controlling the thickness of each layer to be not more than 50cm, embedding cooling water pipes, circulating water for cooling, embedding temperature measuring elements, monitoring the temperature difference between a core part and the surface in real time, and controlling the temperature difference to be within 25 ℃ to prevent temperature cracks; s7, concrete curing, namely immediately covering a plastic film to retain water after pouring, covering geotextiles on the upper part to retain heat and moisture, and curing time is not less than 14 days; and S8, treating a buffer seam, namely arranging the buffer seam between the shock insulation pier and the pavement foundation, taking out the foam polyethylene plate with the thickness of 10cm, cleaning sundries in the buffer seam, and sealing the buffer seam by wrapping glass wool with a 24# galvanized steel plate. Further, the construction preparation is carried out before the step S1, a construction special scheme, a large-volume concrete construction operation instruction book and a technical base are compiled and issued to an operation team. Further, in the step S2, manual cooperation with a frog tamper is adopted for rolling compaction, so that sand and stone breakage caused by over vibration is avoided. In the step S6, low-hydration cement is adopted, a high-efficiency water reducing agent and a proper amount of fly ash are mixed, the mixing ratio is adjusted, and the slump is controlled. Further, in the step S8, the No. 24 galvanized steel sheet is adhered to the base layer through the PVC waterproof coiled material. Further, in the step S8, a stainless steel plate support is arranged at the upper end of the No. 24 galvanized steel plate, and the end part of the stainless steel plate support is connected with a ter